Building element



Patented Api'. 17, 1928 UNITED STATES FREDERICK M. VENZIE, OFPHILADELPHIA, IENNSYL'VANIA.

BUILDING ELEMENT.

Application filed July 7, 1923. Serial No. 650,018.

This invention relates to a building composition principally forout-of-door use, and is designed to replace plaster and plastercompositions and to replace bot-h wood and metal lath, thus gi'eatlyreducing cost of building operations. My composition may be made intoslabs and it may be applied as a coating material and ithas theadvantage ot' resisting weather conditions so that it does notdeteriorate and crumble as does plaster.

The invent-ion consists of the improvements hereinafter described andlinally claimed.

l5 The nature, characteristic features and scope ot' the invention willbe iiioi'e fully understood when taken in connection with theaccompanying drawings forming part hereof and in which Fig, l, is a faceof a slab as formed from my improved compositon, and

Fig. 2, is a top or plan View ot a pair ot such slabs positioned toreceive a finishing coat ot my improved material.

In manufacturing my building composi- -tion for slabs or coating forexterior building purposes I take saw-dust, granulated cork orgranulated sponge in the proportion of about three parts, in bulk, towhich I add and mia therewith about one pai't of Magncsite in dry,powdery torni. To this dry, powdery mixture I now add about one part otchloride in liquid t'orm. rIhe composiltion is then iiioistened suitablefor molding in slab torni. I prefer to mold the slabs in the forni shownin the drawings although obviously other terms may be utilized. The slabl() is shown as having a bevellel marginal portion 1l entirelytherearouiid. IVhen the slabs are positioned as shown in Fig. 2, theadjacent bevelled parts oi'm V-sliaped parts to receive the finishingcoat thus effectv ing a goed bond. The iinishing coat, which isdesignated l2, may be applied very thinly since the slab material inelfect forms a rough coat. The slabs are porous, and not hard andbrittle and ma be nailed to partitions or otherwise positioned as byclips between vertical supports. The composition if desired may be usedfor general purposes similar tor plaster instead of being formed intoslabs. The composition is of fire and moisture resisting texture.

The finishing coat I prefer to use in connection with my above describedcomposition is made in the manner following I take about one part ofMagnesite, about two parts of granulated asbestos, from one to twopai'ts of sand and about one and one-half parts of liquid chloride andmix altogether by the addition of suHicient water to make a mortar-likeconsistency. This composition is used similar to plaster. In order toprovide an anchor for the finishing coat I provide the bevelled face ofmy improved slab with a plurality of depressions designated 15 which arespread ovei' the entire i'ace of the slab but do not extend entirelythrough the slab. The walls of these depressions are inclined as at 16so that a 70 depression opening is of gradually increasing diameter asit nears a slab center. Thus the linishing coat readily anchors withinsuch depressions.

lV hat I claim is 2- 75 A thin, rectangular slab for building pui'-poses having a flat inner dished upper sui'- face` said dislied partbeing marginally bevelled, and the outer surface of said slab beingbevelled in an opposite direction with S0 the two bevelled parts comingtogether to form a sharp marginal edge, the flat. upper surface of saidslab being provided with a plurality of shallow depressions havinginclined walls so arranged that the diameter S5 of said depressionsincrease as they near the slab centre. n

In testimony whereof I have hereunto signed my name.

FREDERICK M. VENZIE.

